dmaengine: xilinx: xdma: Fix typo

Probably a copy/paste error with the previous block, here we are
actually managing C2H IRQs.

Fixes: 17ce2522

 ("dmaengine: xilinx: xdma: Add xilinx xdma driver")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20230731101442.792514-3-miquel.raynal@bootlin.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>